Spirit AeroSystems, a key Boeing supplier, is temporarily laying off workers on its 737 production line to manage an inventory surplus, the company said Friday.

Spirit AeroSystems said there is "substantial doubt about the company's ability to continue as a going concern" though Boeing and Airbus are planning to acquire portions of the parts maker.

(Reuters) -Aerospace supplier Spirit AeroSystems on Thursday reported a drop in first-quarter revenue, hurt by slower production across most programs at its key customer Boeing. Spirit said production on the Boeing 737 program was higher early in the first quarter of 2024 as it prepared for expected rate increases, which were later delayed.